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Earth Observing System (EOS) Mission Status. NOAA Direct Broadcast Conference April 6, 2011. Terra. Aqua. Presented by Patrick Coronado ( Information provided by NASA/GSFC: Angie Kelly, Bill Guit, and Eric Moyer). Aura. EOS Terra, Aqua, and Aura Missions. Terra:

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Earth Observing System (EOS)

Mission Status

NOAA Direct Broadcast ConferenceApril 6, 2011

Terra

Aqua

Presented by

Patrick Coronado

(Information provided by NASA/GSFC: Angie Kelly, Bill Guit, and Eric Moyer)

Aura


EOS Terra, Aqua, and Aura Missions

  • Terra:

  • Launch Date: December 18,1999 (Atlas IIAS, VAFB)

  • Orbit: 705 km, sun-synchronous polar, 98.2oInclination, 10:30 AM MLT descending node

    • Instrument Payload: ASTER (SWIR, TIR & VNIR) (Japan); CERES (Fore & Aft) (USA – NASA LaRC); MISR(USA –NASA JPL); MODIS (USA – NASA GSFC); MOPITT (Canada)

  • Aqua:

  • Launch Date: May 4, 2002 (Delta, VAFB)

  • Orbit: 705 km, sun-synchronous polar, 98.2oInclination, 1:30 PM MLT ascending node

  • Instrument Payload: AMSR-E (Japan); AMSU (USA –NASA JPL); AIRS (USA –NASA JPL); CERES(USA – NASA LaRC); HSB (Brazil); MODIS (USA – NASA GSFC)

  • Aura:

  • Launch Date: July 15, 2004 (Delta, VAFB)

  • Orbit: 705 km, sun-synchronous polar, 98.2oInclination, 1:45 PM MLT ascending node

  • Instrument Payload: HIRDLS (UK/NASA/UCAR); MLS ((USA –NASA JPL); OMI (KNMI, Netherlands); TES (USA –NASA JPL)

  • EOS Project Management:Earth Science Mission Operations (ESMO), NASA GSFC

  • Mission Operations: NASA GSFC

  • Instrument Operations and Science Data processing: Performed at respective Instrument Locations

  • Science Data Processing: Level zero: EOS Data Operations System (EDOS); Level 1+: Various Data Centers and Investigator-led Processing Facilities in the US and International Partner Facilities


Terra summary
Terra Summary

  • Spacecraft Status - GREEN

  • Instrument Status - GREEN

    • ASTER: VNIR and SWIR nominal; SWIR ops ended 2008

    • CERES: Operating Normally

    • MISR: Operating Normally

    • MODIS: Operating Normally

    • MOPITT: Operating Normally

  • Data Capture/L0 Processing Status – GREEN

    • SSR Data Capture over life of the mission: ~99.00 %

  • Ground Systems – System Upgrades in progress

    • Implementing system changes and new back-up control center

    • No planned interruptions to operations

    • Completion in Summer 2011


Terra

Predicted Propellant Usage based on Nominal Solar Flux

  • Terra has sufficient propellant to maintain Mean Local Time (MLT) of 10:30am +/- 1 minute through 2017

  • Terra can continue to operate through Summer of 2019 by allowing MLT to drift towards minimum MLT requirement of 10:15 am (established prior to launch)


Aqua mission summary
Aqua Mission Summary

  • Spacecraft Status - GREEN

  • Instrument Status - GREEN

    • AMSR-E, AIRS, AMSU, CERES & MODIS:

      • Operations Nominal – Producing Great Science

    • HSB: Survival Mode since 2/5/2003

  • Data Capture/L0 Processing Status – GREEN

    • SSR Data Capture to over life of the mission: ~99.97 %

  • Data Latency – Excellent

  • Ground Systems – System Upgrades in progress

    • Implementing system changes and new back-up control center

    • No planned interruptions to operations

    • Completion in Summer 2011


Aqua Fuel Usage: Actual & Predicted

Ascent Maneuvers

Fall 2004 Delta-i Maneuvers

Fall 2006 Delta-i Maneuvers

Spring 2009 Delta-i Maneuvers (9)

Annual Delta-i Maneuvers

Spring 2007 Delta-i Maneuvers

Spring 2018 Delta-i Maneuvers

Spring 2010 Delta-i Maneuvers (3)

Aqua spacecraft has sufficient fuel to maintain its current orbit within the Afternoon Constellation through FY2018 and possibly well beyond


Aura summary
Aura Summary

  • Spacecraft Status - GREEN

  • Instrument Status - GREEN

    • HIRDLS: Not collecting science data – Chopper Stalled 03/17/08

    • MLS: Operating Normally

      • Periodic Band 13 measurements

      • THz module currently in standby mode

    • OMI: Operating Normally

      • Field-of-View Anomaly started in September 2007 – currently stable

    • TES: Operating Normally

  • Data Capture/L0 Processing Status – GREEN

    • SSR Data Capture over life of the mission: ~99.99 %

  • Ground Systems – System Upgrades in progress

    • Implementing system changes and new back-up control center

    • No planned interruptions to operations

    • Completion in Summer 2011


Aura Fuel Usage:

Actual& Predicted

Ascent Maneuvers

Spring 2009 Inclination Adjust Maneuvers (9)

Spring 2010 Inclination Adjust Maneuvers (3)

Spring 2018 Inclination Adjust Maneuvers

Aura spacecraft has sufficient fuel to maintain its current orbit within the Afternoon Constellation through FY2018 and possibly well beyond



Terra Anomaly* History

* --Significant anomalies


Aqua spacecraft subsystems
Aqua Spacecraft Subsystems

All subsystems still configured to primary hardware

  • Command & Data Handling (CDH) – Nominal

    • Solid State Recorder (SSR) – only holds 2 orbits of data

    • SSR Anomaly (12/02/07) – fully recovered 01/28/09

  • Communications (COMM) – Nominal

  • Electrical Power System (EPS) – Nominal

    • Battery Cell Anomaly (09/02/05)

    • Solar Panel #8 Thermistor #6 Failure (08/03/09)

    • Solar Array Offset (Reported 11/17/09, Corrected 06/29/10)

  • Flight Software (FSW) – Nominal

  • Guidance, Navigation & Control (GN&C) – Nominal

  • Propulsion (PROP) – Nominal

    • Dual Thruster Module (DTM-2) Heater Anomaly (09/08/07)

  • Thermal Control System (TCS) – Nominal


Aura spacecraft subsystems
Aura Spacecraft Subsystems

All subsystems configured to primary hardware

  • Command & Data Handling (CDH) – Nominal

    • Solid State Recorder (SSR) Anomaly (December 4-18, 2007)

      • Returned Nov 2010 – Jan 2011 at reduced level – then subsided

  • Communications (COMM) – Nominal

  • Electrical Power System (EPS) – Nominal

    • Solar Panel Connector Anomaly (January 12, 2005)

    • Solar Array Offset (Reported 11/17/09, Corrected 06/29/10)

    • Array Regulator Electronics 5A Anomaly (March 11, 2010)

      • Simultaneously with GN&C Attitude Disturbance

  • Flight Software (FSW) – Nominal

  • Guidance, Navigation & Control (GN&C) – Nominal

    • Earth Sensor Assembly (ESA) Anomaly (May 29, 2009)

      • Recovered by re-calibration in Fall 2009

  • Propulsion (PROP) – Nominal

    • Dual Thruster Module (DTM-3) Anomaly (Aug 16, 2005)

  • Thermal Control System (TCS) – Nominal


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